774070021 has 2 divisors, whose sum is σ = 774070022. Its totient is φ = 774070020.

The previous prime is 774069983. The next prime is 774070039. The reversal of 774070021 is 120070477.

774070021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620557921 + 153512100 = 24911^2 + 12390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774070021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (774070321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387035010 + 387035011.

It is an arithmetic number, because the mean of its divisors is an integer number (387035011).

Almost surely, 2^774070021 is an apocalyptic number.

It is an amenable number.

774070021 is a deficient number, since it is larger than the sum of its proper divisors (1).

774070021 is an equidigital number, since it uses as much as digits as its factorization.

774070021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 774070021 is about 27822.1138844625. The cubic root of 774070021 is about 918.1777181350.

The spelling of 774070021 in words is "seven hundred seventy-four million, seventy thousand, twenty-one".